No Sadaqa is payable on the grains and dates till it (comes to the Weight) of five wasqs, or less than five heads of camels, or less than five uqiyas (of silver). (Using translation from Muslim 979f)
قَالَ النَّبِيُّ ﷺ لَيْسَ فِي حَبٍّ وَلَا ثَمَرٍ صَدَقَةٌ حَتَّى يَبْلُغَ خَمْسَةَ أَوْسَاقٍ وَلَا فِيمَا دُونَ خَمْسِ ذَوْدٍ صَدَقَةٌ وَلَيْسَ فِيمَا دُونَ خَمْسِ أَوَاقٍ صَدَقَةٌ